I honeslty just need the answer .

38Watts

Explanation:

Given parameters:

Mass = 75kg

height  = 8.5m

time  = 165s

Unknown:

Power = ?

Solution:

Power is the rate at which work is done.

 Power  =

 Work done = mgh

m is the mass

g is the acceleration due to gravity = 9.8m/s²

 h is the height

Now insert the parameters and solve;

     P  =   = 38Watts

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.